Power tool



Jan. 29, 1935. N, w HAR'TMAN 1,989,416

' POWER TOOL Filed March 19/ 1952 Hllll ill Patented Jan. 29, 1935 POWERTOOL- Noble W; Hartman, Toledo,, Ohio, assignor, by, mesneassignments,of one-half to Daisey-E.- W:

Bay, Toledo, .Ohio

Application Mar uis, 1932,;Se1flal.-N0 599 93'z i 2 Claims.

This invention relates to power tools.

This invention has utility when embodied in mills, especially coffeemills for household use.

Referring to the drawing:

Fig. 1 is a side elevation of an embodiment of the invention as acomminuting device or mill for household use, say in the grinding ofcoffee;

Fig. 2 is a fragmentary view from the left of Fig. 1;

Fig. 3 is a section on the line IIIIII, Fig. 2;

Fig. 4 is a section on the line IV-IV, Fig. 1; and

Fig. 5 is a plan view of the motor.

At a convenient location, say upon wall 1, by screws 2 is mounted flange3 having central seat 4 to sleeve boss 5. This boss 5 is a sleevedextension of housing section 6 having companion housing section '7, withbearing extension 8 therefrom in alignment with the boss 5. Thisextension 8 is integral with flare mill housing section 9. This section9 has semi-circular flange 10. An additional mill housing sectioncomplementary to the section 9 has semi-circular flange 11 complementalto the flange 10, with mill housing section 12 opposing the housingsection 9, and supply duct section 13 to mill chamber 14 in the housing9, 12. The housing 9 in alignment with the boss or sleeve 5 and bearing8, has bearing 15 extending to internally threaded portion 16.

In this tubular boss 5 is located shaft 17 rotatable in this boss 5 as abearing, as well as the bearings 8, 15. The housing 6, '7, provideschamber 18 for worm wheel 19 splined on the shaft 1'7.

In the housing chamber 14 fixed with shaft 17 is feeding scroll 20 togrinding disk 21 keyed with the housing 12 from which the material assubdivided coffee beans passes over toward the housing section 9, andthere is directed by vane carrying disk 22 as an opposing burr disk tothe disk 21. This disk 22 is keyed to the shaft 1'7 and is normallyaxially adjusted as to its engagement with the disk 21. As the materialis comminuted in this housing chamber 14, vanes on the disk 22 directthis subdivided material for passing from this mill housing by port 24,centrally of the sectional flange 10, 11.

The opening adjustment between the burrs 21, 22, is determined by theaxial play of the shaft 1'7. This shaft 1'7 has threaded extension 25having loosely thereon sleeve 26 externally threaded and engaging withthreaded portion 16 on the extension from the housing 12. This sleeve 26has integral flange or ratchet wheel 27. The threaded portion 25 extendsthrough this sleeve and ratchet portion and there carries nut 28. Theshaft 1'7 is accordingly free to rotate relatively to this ratchet wheel2'7. Fulcrum pin29 mounts dog 30, normally urged by torsion spring 31into engagement with the ratchet 2'7. It is thus seen, by lifting thepawl 30 and rotating the ratchet 2'7, the sleeve 26 may be axiallyadjusted in extension from the housing 12, and thus adjust clearancebetween the disks 21, 22, by axial shifting of the shaft 17. There isthus ready adjustment for the housewife to use in regulating thefineness for the grinding operation.

The housing sections 6, '7, oppositely from the flange 10,11, havesemi-circular flange sections 33, 34, providing a seat for sleeve 35.

In this sleeve 35 is located electric motor unit 36. Electric supplylines 37 extend into this housing where switch 38 may be thrown to cutthe motor into operation or shut it ofi. This sleeve 35 has top plate 39having therein screw 40.

eatsu 's shaft 41 extending therethrough to have key connection 42 withcoupling 43 having worm 44 effective in the normal direction ofoperation of the motor 36, to have its thrust downward against ball 45from the rotor of the motor and the shaft 41. There is thus avoided wearat terminus 45' of the shaft from the actuating. worm 44. This worm 44is in mash with the the worm wheel 19. Bolts 46 assemble the sections 6,'7, and bolts 47 assemble the sections 9, 12. Hinge pin 48 mounts funnel49, having internally threaded seat 50 which may be engaged by theexternally threaded neck portion 51 of the glass jar 52, say of theMason type, and thus provide a container for the coffee or substance tobe ground. This container may be readily removed and replaced andoriented from down position to upward position adjacent the motor, andthere engaged by spring latch'pin 53 to hold against shifting. It isthus seen that with the container tipped away from the passage 13,coffee may be poured into the container as a charge magazine orreservoir, or a substitute filled magazine 52 may be installed. Inswinging such over to charging position, this may be done rapidlywithout any occasion for spilling the contents.

Upon throwing the switch 38, the mill is started and the coifeeautomatically sliding down thereinto is ground and passes by the port 24into receiver or glass 54.

From the flange section 10, there is depending bracket 55 having offset56 opposing the flange 10, 11, and there having seat 57 normallyupwardly thrust by compression helical spring 58 about stem 59,extending through the offset 56 to eye 60. The housewife may, by havinga finger enter the eye 60, lower the seat 57 so that the glass 54 may beremoved with the ground charge of coffee desired, after she has shut ofithe motor 36 by throwing the switch 38 to off position.

Screw 61 may wedge clip 62 to hold the lines 37 against transmittingpull to the terminals on the motor 36.

What is claimed and it is desired to secured' by Letters Patent is:

1. A gear housing, a mounting bracket therefor, a transmission shaftfrom said housing oppositely from said bracket, 'a mill mounted by thehousing to be driven by said shaft, a sleeve upwardly from the housingand having an open upper end, a motor insertable into the open end ofsaid sleeve and having connection therefrom for operating saidtransmission shaft, a shaft for the motor, a conductor line to themotor, and a top plate centering the motor shaft as to the sleeve, saidplate including a clamping clip for anchoring the line with the housingagainst transmitting pull on the line to the motor.

2. A mill comprising a horizontal housing, detachable supporting meansat one end of the housing, a horizontal rotary shaft inthe housing,rotary abrading means secured to the end of the shaft, cooperatingabrading means secured to the interior of the housing, a supply hopperabove the abrading means and extending upwardly from the housing, and anelectric motor for driving the shaft and mounted on a vertical axisparallel to the supply hopper and driving the shaft between the supplyhopper and the supporting means.

NOBLE W. HARTMAN.

